Method checkMissChanges

packages/core/src/engine/engine.ts:369–387

(revisionUpgradeTo: number)

  // Check the missing version of the remote changeset, and if there is one, directly fill in the missing changeset and apply it to the snapshot.
  async checkMissChanges(revisionUpgradeTo: number) {
    const revision = this.getRevision();

    /**
     * The remote newChange version needs to be exactly equal to the version + 1 to go through the normal process.
     * If the version gap is greater than 1, you need to fill in the intermediate version
     */
    if (revisionUpgradeTo === revision + 1) {
      return;
    }
    if (revisionUpgradeTo <= revision) {
      return;
    }

    const changesetList = await this.fetchMissVersion(revision + 1, revisionUpgradeTo);
    changesetList.forEach(cs => {
      this.applyNewChanges(cs);
    });
  }

  // Check the version gap between the local snapshot and the local changeset.
  // If there is a gap, transform and rebase the localChangeset.